Cable-stringer



(No Model.)

. F. A.-GANNON. CABLE STRINGERJ N0. 603,991. Patented May 10,- 1898.

each other within the tube.

.FRANK A. CANNON, OF DENVER, COLORADO.

CABLE-STRING ER.

' SPECIFICATION formingpart of Letters Patent N 0. 603,991, dated May10, 1898.

Application filed December 3, 1897. Serial No. 660,716. (No model.)

To all whom it may concern:

Be it known that I, FRANK A. CANNON, a citizen of the United States ofAmerica, re siding at Denver, in the county of Arapahoe and State ofColorado, have invented certain new and useful Improvements in Cable-Stringers; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the figures of .reference markedthereon, which form a part of this specification.

My invention relates to improvements in means to facilitate the placingof aerial cables upon their supporting cross-arms and thesuspension-wire.

The invention is specially designed for use in connection with electriccables composed of a number of wires placed within a lead tube orsheath, the Wires being insulated from The invention may, however, beemployed for any similar or analogous purpose. This style of cable ismuch used in telephone,telegraphic,and other electric service. It isprovided with hooks located at suitable intervals, the said hooksengaging a suspension wire supported by cross-arms attached to uprightpoles. tofore much labor has been required to support the cable atpoints where the cross-arms are located in order to prevent the injuryof the lead sheath by rubbing on the said arms during the stringingoperation. It will be readily understood that care must be exercised toprevent the sheath from wearing, since an opening therein would allowmoisture to enter and eventually destroy the insulation. This wouldresult in short-circuiting the current and ruin the cables until thetrouble was located and remedied.

Having thus briefly outlined the object of the invention and thedifficulties it is designed to overcome, I will proceed to describe thesame in detail, reference being made to the accompanying drawings, inwhich is ill ustrated an embodiment thereof.

In the drawings, Figure 1 illustrates my improvement in use. Thecross-armis shown in end view and a portion of the cable andHeresuspension-wire in side elevation. Fig. 2 is a cross-section takenthrough the cable and suspension-wire, the other parts being shown inelevation.

Similar reference characters indicating corresponding parts in theseviews, let the. numeral 5 designate the cross-arm, to which is fasteneda bracket 6 by means of a suitable screw-clamp 7. The upper part 6 ofthis bracket rests on the cross-arm, above which it projectssufficiently to receive a roller 8, which is mounted on a spindle 9,journaled in the bracket. The face of the roller is concave to fit thecable 10. Each arm of the bracket is provided with a groove 6, locatedabove the roller. These grooves are located on opposite sides of thecable when the latter is in place. They are adapted to receive thesuspension-wire 12 during the operation of placing the cable inposition. Only onegroove is utilized at a time, since there is only onesuspension-wire. The cable is provide-d with hooks 13, which are clampedthereon at suitable intervals.

In preparing to string a cable-line the suspension-wire 12 is placed inposition on the cross-arms 5. is clamped to each of these cross-arms fora distance on the line equal to the length of the cable-section to behandled at one time. As each device is attached to the cross-arm thesuspension-wire is lifted from the crossarm and placed in one of thegrooves 6. After the hooks 13 have been attached to the cable one end ofthe latter is carried to the cross-arm of the pole at one terminal ofthe line or where the stringing of the cable is to commence. The cableis placed on the roller 8 of the arm and a rope attached to itsextremity. This rope is stretched over all of the cross-arms to which myimproved bracket and roller have been attached. The rope should engagethe rollers. To the opposite end of this rope is attached a team or anyother power capable of drawing the cable-section into position on thecross-arms. As the cable is moved along by the power employed therollers turn and thus prevent any frictional Wear upon the cable. As theportion of the cable containing a hook passes over any roller the hookis raised above the sus- One of my improved devices poles to lift thecable, prevent its dragging on the cross-arms, and to hook it upon thesuspension-wire after it has passed beyond the cross-arms. After anysection of the cable has been placed in position in the manner explainedthe clamp 7 is loosened and each roller-carrying bracket removed fromits cross-arm. As the brackets are removed the cable and suspension-wireare let down upon the cross-arms,where they normally rest and whichsubsequently form the direct support therefor. The roller-carryingbrackets are then attached to other cross-arms on the line and anothersection of cable laid in the same manner as heretofore explained, thisoperation being repeated until the entire cable-line is suspended.

A single cross-arm only is shown in each view of the drawings, while thesupportingpole is omitted altogether. This showing, however, is believedsufficient to illustrate my invention, as a more extended showing wouldsimply amount to a duplication of parts.

In Fig. 1 the proximity of the hooks to each other is exaggerated ascompared with the scale of the other parts. In practice these hooksa'reusually placed about two feet apart. The number of suspension-hooksis immaterial and has nothing to do with my invention.

It must also be understood that I do not .limit the invention to thedetails of construcon said bracket and adapted to engage the cable, thebracket being provided adjacent the roller with a ledge for supportingthe suspension-wire.

2. In an aerial cable-stringer, the combination with suitable means forsupporting the cable and suspension-wire, of a bracket detachablyapplied to said means and projecting above the same, and a rollerjournaled in the upper part of the bracket and adapted to engage thecable during the operation of stringing, the bracket being provided witha groove or recess adjacent the roller, to receive the suspension-wire.

3. In an aerial cable-stringer, the combination with means forsupporting the cable and suspension-wire, the cable being provided withhooks to engage said wire, of a bracket detachably applied to saidsupporting means and projecting above the same, a concavefaced roller journaled in the upper part of the bracket and adapted to support thecable during the stringing operation, the bracket being providedadjacent the roller with a groove or recess adapted to receive thesuspension-wire, the construction being such that as the cable is drawnover the roller its hooks are disengaged from the suspension-wire, butrengage the same automatically as the hooks leave the roller.

4. In an aerial cable-stringer, the combination with suitable means forsupporting the cable and suspension-wire, of a bracket detachablyapplied to said means, a roller journaled in said bracket and adapted toengage the cable during the operation of stringing, and means locatedadjacent the roller for supporting the suspension-wire.

5. In an aerial cable-stringer, the combination with suitable means forsupporting the cable and suspension-wire, of a roller detachably mountedon said means and projecting above the same, ,said roller being adaptedto support the cable during the operation of stringing, and suitablemeans located adjacent the roller and adapted to support thesuspension-wire in approximately the same plane as the roller.

In testimony whereof I aflix my signature in presence of two witnesses.

FRANK A. CANNON.

WVitnesses:

ISHAM R. HoWzE, EDITH HIMSWORTI-I.

